Kastar LP-E4N Fully Decoded Battery for Canon EOS 1D Mark IV, Mark 4, MarkIV | eBay
D battery - Wikipedia
Canon NP-E3 Battery by Wasabi Power
Kastar 3-Pack LP-E4 Battery 11.1V 4400mAh Replacement for Canon EOS 1D C, EOS 1D X, EOS 1D X Mark II, Mark 2, EOS 1D Mark III, Mark 3, EOS 1Ds Mark III,
Amazon.com: 2200mAh Battery for Canon EOS 1D, EOS 1D Mark II, EOS 1D Mark II N : Electronics
Amazon.com: Ultimaxx Replacement for Canon LP-E19 Lithium-Ion Rechargeable Battery, Compatible with Canon EOS R3, EOS-1D Mark III, EOS-1D Mark IV, EOS-1Ds Mark III, EOS-1D X, EOS-1D X Mark II, EOS-1D X Mark